Watermark your photos
For photographers sending proofs, agents listing a property, sellers posting product shots: mark them all in one go, in this browser, without handing the originals to anyone.
- Runs entirely in your browser
- Works offline
- No upload
- No sign-up
- No watermark
Loading the tool…
How it works
- Drop the photos — as many as you like, HEIC from an iPhone included.
- Type the text or choose your logo, then pick the position, size and opacity; the preview shows the first photo.
- Apply. One photo downloads directly; several come as a ZIP.
Why nothing is uploaded
Every operation on this page is done by code running inside your browser tab, using the same engine that renders web pages. The file is read from disk into your tab’s memory, transformed there, and written back out as a download. It is never sent anywhere — not to us, not to a third party.
Verify it yourself
- Open your browser’s developer tools (F12) and select the Network tab.
- Load your file and run the tool.
- The only requests you will see fetch the tool’s own code — and, for a few heavy tools, their open-source engine (also from this site) or an AI model from Hugging Face — plus one small page-view ping to loreatec.jp (page address and title, nothing more). None of them carry your file.
Frequently asked questions
Why is the size given as a share of the short side?
So that one setting fits a whole mixed batch. A mark sized against the width would be twice as big on a landscape shot as on a portrait one; against the short side it reads the same on both, and on a phone photo and a camera file alike.
Does it keep the location data of my photos?
No. The marked copies are newly encoded images, so the original metadata — camera, date and the GPS position many phones record — is not carried over. If you post property or product photos taken at home, that is usually what you want.
Can a watermark be removed?
A determined person with an editor can paint over a small corner mark. A tiled, semi-transparent mark across the whole picture is much harder to clean, which is why it is the usual choice for proofs; a corner mark is the polite choice for finished work.
Are my photos uploaded?
No. They are decoded, marked and saved by this browser tab; nothing is sent anywhere.